JP2013258615A - Display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display system in which a display device, subjected to remote control, can be changed easily among a plurality of display devices.SOLUTION: A display device 2 executes an instruction content based on the instruction information received by a light-receiving section 8, only when a laser light detecting section 15 detects laser light emitted from a remote controller 20. Since a user can emit laser light from the remote controller 20 so as to be detected by the laser light detecting section 15, only that display device 2 can execute the instruction content. Since the user is simply required to irradiate laser light from a display device subjected to remote control, the display device subjected to remote control can be changed easily among a plurality of display devices.

Description

  The present invention relates to a display system in which a plurality of display devices are connected.

  A multi-display system arranges a plurality of display devices in a single line, a matrix, etc., and displays various images by dividing one image and linking images displayed on the respective display devices. It is a display system applicable to an aspect.

  In the connection method of connecting a plurality of display devices, other devices are connected to the central device, the central device controls the other devices collectively, the so-called star connection method, the multiple devices are connected in series, There is a so-called daisy chain connection method that sequentially outputs control commands from the most upstream device to the downstream device.

  In such a display system, for example, when image quality adjustment of each display device is performed, an adjustment command is input to the central device or the most upstream device to adjust the image quality of the display device to be adjusted. I do.

  The adjustment command may be input from a central device or an input device wired to the most upstream device, but a command input device for remote control that is input by wireless communication using infrared rays, so-called remote control. It is easier to use the controller.

  Since the display system uses a plurality of display devices having the same specifications, it is difficult to input a command only to the display device to be controlled by the command when a command is input by the remote controller. Infrared light emitted from the remote controller propagates in the air while spreading at a predetermined angle, so when there are a plurality of infrared light receiving portions of the display device at a short distance, the emitted infrared light is received by the plurality of light receiving portions, The same command is input to a plurality of display devices.

  Further, as the number of display devices increases, it is necessary to adjust individual display devices in accordance with the overall state, and in order to overlook the whole, it is necessary to make adjustments while confirming the whole away from the display device. However, when the display device is separated from the display device, the effective range of infrared rays expands, and the same command is input to more display devices.

  If a command is input only to the display device to be controlled, the remote controller must be operated close to the display device to be controlled so that only the display device to be controlled is included within the effective infrared range. Don't be.

  In addition, by shielding the light receiving part of a display device other than the display device to be controlled, only the light receiving part of the display device to be controlled can receive infrared rays even if the remote controller is operated remotely. You can also.

  In the display device described in Patent Document 1, when a single image is enlarged and displayed on a plurality of display devices, the display device that displays a predetermined area of the enlarged image is controlled by a remote controller. A signal can be received.

JP 2006-337482 A

  In the display device described in Patent Document 1, only one display device among a plurality of display devices can receive a control signal from the remote controller, but the display device that receives the control signal displays a predetermined region. The display device to be controlled cannot be easily changed.

  An object of the present invention is to provide a display system capable of easily changing a display device to be remotely controlled among a plurality of display devices.

The present invention is a display system having a plurality of display devices communicably connected to each other and a remote control device that transmits command information to the display device by wireless communication,
The remote control device is:
An input means for inputting the instruction content;
Transmitting means for transmitting command information corresponding to the input command content to the display device by wireless communication;
Emitting means for emitting electromagnetic waves having directivity,
The display device
Display means having a display surface for displaying an image;
Wired communication means for performing wired communication with other display devices;
Receiving means for receiving the command information transmitted from the transmitting means of the remote control device by wireless communication;
Detecting means for detecting electromagnetic waves emitted from the emitting means of the remote control device;
Control means for executing the command content based on the received command information if the detection means detects the electromagnetic wave, and not executing the command content based on the received command information if the electromagnetic wave is not detected. Display system.

  Further, the present invention is characterized in that the detection means is provided so as to be able to detect that the display surface of the display means is irradiated with the electromagnetic wave emitted from the emission means of the remote control device.

  In the invention, it is preferable that the remote control device further includes an emission instruction unit that instructs the emission unit to emit the electromagnetic wave.

  According to the present invention, the remote control device further includes a batch instruction unit that instructs the transmission unit to transmit the command information and instructs the emission unit to emit the electromagnetic wave.

  According to the present invention, the display system includes a plurality of display devices that are communicably connected to each other and a remote control device that transmits command information to the display device by wireless communication.

  In the remote control device, when command content is input by the input means, command information corresponding to the input command content is transmitted to the display device by wireless communication. The emitting means is configured to emit an electromagnetic wave having directivity.

  In the display device, the display unit is configured to display an image on the display surface, and the wired communication unit can perform wired communication with another display device.

  The receiving means receives the command information transmitted from the transmitting means of the remote control device by wireless communication, and the detecting means detects the electromagnetic waves emitted from the emitting means of the remote control device. The control unit executes the command content based on the received command information if the detection unit detects the electromagnetic wave, and does not execute the command content based on the received command information unless the electromagnetic wave is detected.

  The display device executes the command content based on the received command information only when the detection means detects the electromagnetic wave. The user can cause the instruction contents to be executed only by the display device by emitting electromagnetic waves having directivity from the remote control device and causing the detection means of the display device to detect the electromagnetic waves. Therefore, since the user only needs to irradiate the display device desired to be remotely controlled with the electromagnetic wave, the display device to be remotely controlled among the plurality of display devices can be easily changed.

  According to the invention, the detection means is provided so as to detect that the display surface of the display means is irradiated with the electromagnetic wave emitted from the emission means of the remote control device.

  Since the display system of the present invention has a relatively large display screen, the user can make the large display surface a target for electromagnetic wave irradiation, and the operation becomes easy.

  According to the invention, the remote control device further includes an emission instruction unit that instructs the emission unit to emit the electromagnetic wave.

  In order to cause the display device to detect the electromagnetic wave, the electromagnetic wave is emitted by the user by operating the emission instruction unit when it is desired to emit the electromagnetic wave. Whether or not can be controlled as appropriate.

  According to the invention, the remote control device further includes a collective instruction unit that instructs the transmission unit to transmit the command information and instructs the emission unit to emit the electromagnetic wave.

  Since the user can transmit command information and emit electromagnetic waves simply by operating the collective instruction means, the burden on the user's operation can be reduced.

1 is a schematic diagram illustrating a configuration of a display system 1. FIG. 3 is a block diagram illustrating a configuration of a display device 2. FIG. 3 is a block diagram showing a configuration of a remote controller 20. FIG. 2 is an external view of a remote controller 20. FIG. 4 is a schematic diagram for explaining an outline of a laser beam detection unit 15. FIG. 4 is a flowchart showing instruction execution processing by the display device 2.

  In the display system according to the present embodiment, a plurality of display devices are connected in series, that is, a so-called daisy chain connection, and predetermined command information is output from the display device connected on the upstream side to the display device connected on the downstream side. The display device in which the command information is input from the upstream display device is a multi-display system that outputs the command information to the downstream display device. The present invention is applicable not only to the daisy connection method but also to the star connection method.

  The display devices are connected by a wired connection, for example, using an RS-232C standard cable (hereinafter referred to as “RS-232C cable” or simply “cable”). The RS-232C cable is connected to a signal input cable connection connector (hereinafter referred to as “input connector”) or a signal output cable connection connector (hereinafter referred to as “output connector”) provided in the display device. The In the case of serial connection, one of the RS-232C cables is connected to the output connector of the upstream display device, and the other is connected to the input connector of the downstream display device.

  The command information input to the upstream display device is output from the output connector of the upstream display device as an electrical signal indicating the command information, and is sent to the input connector of the downstream display device via the RS-232C cable. Entered.

FIG. 1 is a schematic diagram showing the configuration of the display system 1.
The display system 1 includes a plurality of display devices 2, 3, 4, 5, an RS-232C cable 6 and a remote controller 20. The plurality of display devices 2, 3, 4, and 5 are connected in series via the RS-232C cable 6. The display device 2 is a display device arranged at the uppermost stream, and the display device 3, the display device 4, and the display device 5 are sequentially connected downstream.

  The remote controller 20 can transmit various control information including command information to all display devices constituting the display system 1 through wireless communication such as infrared communication. The RS-232C cable 6 is not connected to the input connector of the most upstream display device 2, and the RS-232C cable 6 is connected to the output connector. The RS-232C cable 6 connected to the output connector of the display device 2 is connected to the input connector of the display device 3 that is one downstream from the display device 2. The RS-232C cable 6 connected to the output connector of the display device 3 is connected to the input connector of the display device 4 that is one downstream from the display device 3. The RS-232C cable 6 connected to the output connector of the display device 4 is connected to the input connector of the display device 5 that is one downstream from the display device 4.

  Furthermore, the remote controller 20 in the present embodiment emits a laser beam, which is an electromagnetic wave having directivity, in order to specify one display device to be remotely controlled among the display devices 2 to 4. When the user operates the remote controller 20 toward the remote control target display device, the laser light is emitted to the remote control target display device, and the display device detects that the laser light has been emitted, Recognize that it is a remote control target. The display device that has been recognized as a remote control target executes the command content based on the command information received from the remote controller 20. A display device that is not recognized as a remote control target, that is, a display device that does not detect laser light does not execute the command content even if command information is received from the remote controller 20.

  As a result, in a plurality of display devices constituting a multi-display system, when it is desired to change the display device for remote control, it is only necessary to irradiate the display device to be changed with the laser light emitted from the remote controller. The display device can be easily changed.

  FIG. 2 is a block diagram illustrating a configuration of the display device 2. Since the display devices 2, 3, 4, and 5 are all display devices having the same specifications and have the same configuration, FIG. 2 shows the configuration of the display device 2 as an example.

  The display device 2 includes a display 7, a light receiving unit 8, a video signal input connector 9, an input connector 10, an input RS-232C interface 11, an output connector 12, an output RS-232C interface 13, a memory 14, and a laser light detection unit. 15 and the control unit 16.

  The display 7 is a display panel that displays image data, such as a liquid crystal display panel, a plasma display panel, or an organic EL display panel. The light receiving unit 8 receives radio communication radio waves such as infrared rays transmitted from the remote controller 20. The video signal input connector 9 is connected to a video signal cable in order to input image data to be displayed on the display unit 7. The input connector 10 is a connector to which the RS-232C cable 6 is connected. The input RS-232C interface 11 (hereinafter referred to as “input interface”) inputs the input information to the control unit 16 based on an electrical signal input from the RS-232C cable 6 connected to the input connector 10. Is output. The output connector 12 is a connector to which the RS-232C cable 6 is connected. The output RS-232C interface 13 (hereinafter referred to as “output interface”) outputs an electrical signal to the RS-232C cable 6 connected to the output connector 12 based on information output from the control unit 16.

  The memory 14 stores various information such as OSD (On Screen Display) information, cable connection information, and various operation control programs such as a display control program for displaying image data and an execution control program for executing command contents. The

  The laser beam detector 15 detects the laser beam emitted from the remote controller 20. The laser light detection unit 15 includes, for example, an optical sensor, and an appropriate optical sensor may be provided according to the wavelength of the laser light to be detected.

  The control unit 16 integrates a display control circuit, an OSD circuit, and the like, and controls the operation of the entire display device based on an operation control program stored in the memory 14.

  FIG. 3 is a block diagram showing the configuration of the remote controller 20. The remote controller 20 includes an operation unit 21, a control signal transmission unit 22, a laser beam emitting unit 23, a memory 24, and a control unit 25.

  The operation unit 21 includes a power key, a cursor key, a plurality of function keys, and the like, and can be operated by a user to input command contents such as a setting change command and an input switching command. The control signal transmission unit 22 transmits command information corresponding to the input command content to the display device by wireless communication such as infrared communication. The light receiving unit 8 of the display device 2 receives the command information transmitted from the control signal transmitting unit 22.

  The laser light emitting unit 23 emits laser light that is an electromagnetic wave having directivity, and emits laser light to a display device to be remotely controlled. The memory 24 stores each key of the operation unit 21 and command information (command code) indicating the command content assigned to each key in association with each other, and stores an operation program for controlling the operation of the entire remote controller 20. To do. The control unit 25 controls the operation of the remote controller 20 such as transmission of an instruction code based on the operation program stored in the memory 24.

  The laser beam emitting unit 23, for example, like a laser pointer, focuses the emitted light into a relatively small spot, and irradiates two or more display devices with laser light only on one display device. It becomes the structure which can be irradiated. Specifically, a laser product classified into class 1 or class 2 according to JIS C 6802: 2011, and a semiconductor laser that emits red laser light or green laser light can be used.

  The laser light detection unit 15 of the display device 2 detects the laser light emitted from the laser light emission unit 23 of the remote controller 20, and the control unit 25 receives the light receiving unit when the laser light detection unit 15 detects the laser light. If the command content based on the command information received in 8 is executed and no laser beam is detected, the command content is not executed even if the light receiving unit 8 receives the command information.

  If the control target is the display device 2 and command information is transmitted from the remote controller 20 to the display device 2, if the display device 2 is irradiated with laser light from the remote controller 20, the display devices 3, 4, 5 Even if at least one of them is located within the reach of the radio communication radio wave transmitted from the remote controller 20, the display devices 3, 4 and 5 are not irradiated with laser light. , 4 and 5 do not execute the instruction contents.

  In order to switch the display devices 3, 4, and 5 as remote control targets, the laser light emitted from the remote controller 20 may be irradiated onto the display device to be switched and command information may be transmitted.

  FIG. 4 is an external view of the remote controller 20. FIG. 4A shows a plan view, and FIG. 4B shows a front view. The basic configuration of the remote controller 20 is the same as the existing one. As the operation unit 21, a power key 210 for inputting command information regarding power on / off, a menu key 211 for performing settings based on OSD such as image quality adjustment, a cursor key 212 for changing numerical values and items, Various keys such as a switching key 213 for switching on and off of the control target specifying function are provided. When these keys are operated, command information corresponding to the operated keys is transmitted by infrared communication.

  As shown in the front view, the control signal transmitting unit 22 and the laser beam emitting unit 23 are configured such that the emission port is on the distal end side of the remote controller 20 and the control signal is directed toward the distal end of the remote controller 20. Is transmitted, and laser light is emitted.

  The function for designating the display device to be controlled, that is, whether or not to enable the function of emitting the laser beam from the laser beam emitting unit 23 can be switched. When the switching key 213 is turned off, the laser beam emitting unit is turned off. When the switch key 213 is turned on so that the laser beam is not emitted from the laser beam 23, the laser beam is emitted from the laser beam emitting unit 23.

  Further, for example, when each key of the operation unit 21 is operated once by a user, a command content is input, and command information corresponding to the input command content is transmitted from the control signal transmission unit 22. That is, the operation of the operation unit 21 serves as both an instruction content input and an instruction to transmit command information from the control signal transmission unit 22.

  Furthermore, in this embodiment, when each key of the operation unit 21 is operated by the user, command information is transmitted from the control signal transmission unit 22 and laser light is emitted from the laser light emission unit 23. The user transmits the command information from the control signal transmission unit 22 by operating each key of the operation unit 21 only once, and irradiates the display device to be remotely controlled to execute the transmitted command information with the laser light. Can do.

  As another embodiment, an emission key for instructing only the emission of the laser beam from the laser beam emission unit 23 without transmitting the command information from the control signal transmission unit 22 may be provided as a key of the operation unit 21. Good. When the user operates the emission key, the laser beam is emitted from the laser beam emission unit 23 for a certain period of time, so that the laser beam is emitted toward the remote control target display device, and then the user presses each key of the operation unit 21. The command contents may be input and command information transmitted from the control signal transmission unit 22.

  FIG. 5 is a schematic diagram for explaining the outline of the laser beam detection unit 15. As long as the laser light emitted from the remote controller 20 to the display device 2 can be detected by only one display device, the laser light detection unit 15 may have any configuration. Using the display screen 7a of the device 7 as a detection target region, it is detected that the laser light emitted from the remote controller 20 has been applied to the display screen 7a.

  As shown in FIG. 5, in order to set the display screen 7a of the display device 7 as a detection target, the laser light detection unit 15 includes four sensors 150, and each sensor 150 is displayed on the bezel or on the bezel. Are provided at the four protruding corners. Each sensor 150 is provided inward so that the detection area captures the display screen 7a.

  When the laser beam emitted from the laser beam emitting unit 23 is irradiated onto the display screen 7a, a laser spot 151 is formed on the surface of the display screen 7a by the emitted laser beam. When the laser spot 151 is formed on the surface of the display screen 7a, the sensor 150 detects this.

  Note that the number of sensors 150 constituting the laser light detection unit 15 is not necessarily four, and any number may be used as long as the detection area of the sensor 150 can cover the entire display screen 7a.

FIG. 6 is a flowchart showing instruction execution processing by the display device 2.
In step S1, it is determined whether or not the first sensor among the sensors 150 constituting the laser light detection unit 15 has detected the laser light irradiated on the surface of the display screen 7a. If the first sensor detects the laser beam, the process proceeds to step S4, and if not, the process proceeds to step S2.

  In step S2, it is determined whether or not the second sensor among the sensors 150 constituting the laser light detection unit 15 has detected the laser light irradiated on the surface of the display screen 7a. If the second sensor detects laser light, the process proceeds to step S4, and if not, the process proceeds to step S3.

  In step S3, it is determined whether or not the nth sensor among the sensors 150 constituting the laser light detection unit 15 has detected the laser light irradiated on the surface of the display screen 7a. If the nth sensor has detected the laser beam, the process proceeds to step S4. If not, in step S11, it is determined that the own apparatus is not the apparatus designated as the remote control target and stands by.

  In step S4, it is determined that the own device is a device designated as a remote control target, and the process proceeds to step S5. In step S3, it is determined whether the nth sensor has detected laser light. Here, n (an integer of n> 2) is the number of sensors 150 constituting the laser light detection unit 15. Although not shown, each determination such as steps S1 and S2 is performed as many as the number of sensors.

  For all sensors, it is determined whether or not laser light has been detected. If at least one sensor detects laser light, it is determined that the device is a device designated as a remote control target, If the sensor does not detect the laser beam, it is determined that the own device is not a device designated as a remote control target.

  In step S5, the light receiving unit 8 determines whether or not the control signal is received by infrared communication. If the light receiving unit 8 receives the control signal, the process proceeds to step S6, and if the control signal is not received, the process returns to step S1.

  In step S6, based on the received control signal, the control unit 16 receives a command code representing the content of the command. In step S7, it is determined whether the received instruction code is a valid code. Specifically, the received instruction code is, for example, a company code or a division code in a remote control format established by the Home Appliances Association, and these codes are identical to the codes of the corresponding products registered in advance. If it is a valid key code mounted on the remote controller 20, it is determined to be a valid code, and if the received instruction code is any other code, it is determined to be an invalid code. If the received instruction code is a valid code, the process proceeds to step S8. If the received instruction code is an invalid code, the process returns to step S1.

  In step S <b> 8, the control unit 16 temporarily stores the received valid instruction code in the reception buffer of the memory 14. In step S9, the control unit 16 reads and acquires the instruction code stored in the reception buffer of the memory 14.

  In step S10, the control unit 16 interprets the instruction content based on the acquired instruction code, and executes the instruction content.

  Infrared communication is often used as wireless communication for transmitting and receiving remote control signals such as display devices because power consumption is low and the transmission / reception device is easy to miniaturize. As a result, the encoded instruction content is transmitted and received.

  The receiving display device 2 side interprets the specific instruction content from the acquired instruction code, and executes the instruction content.

  A table or the like in which the acquired instruction code and instruction content are associated in advance is stored in the memory 14, and the instruction code is converted into specific instruction content by referring to this table when the instruction code is acquired. After that, execute the instruction contents.

DESCRIPTION OF SYMBOLS 1 Display system 2,3,4,5 Display apparatus 6 RS-232C cable 7 Display 7a Display screen 8 Light-receiving part 9 Video signal input connector 10 Input connector 11 RS-232C interface for input 12 Output connector 13 RS-232C for output Interface 14 Memory 15 Laser light detection unit 16 Control unit 20 Remote controller 21 Operation unit 22 Control signal transmission unit 23 Laser light emission unit 24 Memory 25 Control unit 150 Sensor 151 Laser spot 210 Power key 211 Menu key 212 Cursor key 213 Switching key

Claims (4)

A display system having a plurality of display devices communicably connected to each other and a remote control device that transmits command information to the display device by wireless communication,
The remote control device is:
An input means for inputting the instruction content;
Transmitting means for transmitting command information corresponding to the input command content to the display device by wireless communication;
Emitting means for emitting electromagnetic waves having directivity,
The display device
Display means having a display surface for displaying an image;
Wired communication means for performing wired communication with other display devices;
Receiving means for receiving the command information transmitted from the transmitting means of the remote control device by wireless communication;
Detecting means for detecting electromagnetic waves emitted from the emitting means of the remote control device;
Control means for executing the command content based on the received command information if the detection means detects the electromagnetic wave, and not executing the command content based on the received command information if the electromagnetic wave is not detected. Display system.   The display system according to claim 1, wherein the detection unit is provided so as to be able to detect that the display surface of the display unit is irradiated with the electromagnetic wave emitted from the emission unit of the remote control device.   The display system according to claim 1, wherein the remote control device further includes an emission instruction unit that instructs the emission unit to emit the electromagnetic wave.   3. The display according to claim 1, wherein the remote control device further includes a batch instruction unit that instructs the transmission unit to transmit the command information and instructs the emission unit to emit the electromagnetic wave. system.